CN202869683U - Self-powered high-voltage insulating switch contact temperature on-line measuring device with cylindrical electric field sensor board - Google Patents
Self-powered high-voltage insulating switch contact temperature on-line measuring device with cylindrical electric field sensor board Download PDFInfo
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- CN202869683U CN202869683U CN201220548742.4U CN201220548742U CN202869683U CN 202869683 U CN202869683 U CN 202869683U CN 201220548742 U CN201220548742 U CN 201220548742U CN 202869683 U CN202869683 U CN 202869683U
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Abstract
The utility model relates to insulating switch contact temperature on-line measuring equipment, and particularly to a self-powered high-voltage insulating switch contact temperature on-line measuring device with a cylindrical electric field sensor board. The self-powered high-voltage insulating switch contact temperature on-line measuring device is characterized in that: the self-powered high-voltage insulating switch contact temperature on-line measuring device comprises at least one suspended measuring device (1), a ZigBee base station and a background PC, wherein all the suspended measuring device (1) is in wireless connection with the ZigBee base station through the ZigBee network. Furthermore the ZigBee base station is connected with the background PC through an optical fiber or cable. According to the self-powered high-voltage insulating switch contact temperature on-line measuring device with the cylindrical electric field sensor board, the device can be powered through the high-voltage side of an electric power system through an electric field sensing power supply mode. The self-powered high-voltage insulating switch contact temperature on-line measuring device further has the following advantages: no requirement for an external power supply, high reliability, no maintenance requirement, capability of effectively overcoming the technical bottleneck of supplying power to a suspended device, and high significance for realizing unmanned operation of the transformer station.
Description
Technical field
The utility model relates to isolation switch contact temperature online measuring equipment, especially a kind of self-powered high voltage isolation switch contact temperature online measurement mechanism that adopts cylinder type electric field induction plate.
Background technology
The conventional method that at present electric system is monitored the high-voltage isolating switches in transformer substation contact temperature is to rely on manpower and infrared thermometer to carry out timing to patrol and examine, and this method not only expends a large amount of manpowers, can not realize the Real-Time Monitoring that contact temperature is changed.Also have some on-line measurement schemes to be suggested, but in these schemes because the on-line measurement device is installed on the disconnector high-pressure conductive arm, therefore how the problem of the power supply of solving device is the bottleneck of technology.
Existing scheme comprises: (1) suspension temperature measuring equipment, adopt solar cell for supplying power.In this scheme, it is that the floating measurement device is powered that solar panel is used to, and configuration accumulator in the device is used under illumination condition energy being stored, and provides power supply unglazed the photograph under the condition for the device continuous firing.The subject matter one of this technical scheme is the impact that is subject to easily environment, and for example the generating capacity of solar panel is decided by illumination condition, and night or rainy weather and dust cover lower generating capacity and be extremely restricted; Secondly, the mission life of accumulator is limited, and the energy storage releasability is subject to great restriction at low temperatures.(2) suspension temperature measuring equipment adopts the field coil inductive power supply.The power supply of measurement mechanism comes the load current in the induction line to realize by coil in this scheme.The greatest problem of this scheme is that load current always is among the continuous fluctuation, and the stability of power supply faces the challenge.
The utility model content
The purpose of this utility model provides a kind of self-powered high voltage isolation switch contact temperature online measurement mechanism that adopts cylinder type electric field induction plate, has effectively overcome the technical bottleneck of levitation device power supply, and power supply reliability is high and non-maintaining.
A kind of self-powered high voltage isolation switch contact temperature online measurement mechanism that adopts cylinder type electric field induction plate, its special feature is: comprise that at least one hangs measurement mechanism, ZigBee base station and backstage PC, wherein all hang measurement mechanism all and pass through the ZigBee-network wireless connections between the ZigBee base station, and connect by optical fiber or cable between ZigBee base station and the backstage PC.
Wherein hang measurement mechanism and comprise the aluminum cylinder that is sleeved on the disconnector conductive arm, this aluminum cylinder is rigidly connected by insulating support and the installation copper hoop that is installed on the disconnector conductive arm, thereby between aluminum cylinder and disconnector conductive arm, form cavity, insulating support in this cavity is equipped with two aluminum capsuls, in these two aluminum capsuls, be separately installed with telemetry circuit and transformer storage capacitor circuit, and connect by cable between these two circuit; Also comprise a thermopair, the thermometric end of this thermopair contacts with isolation switch contact, and its signal output part is electrically connected with telemetry circuit in the aluminum cylinder by cable; This telemetry circuit also is connected with an antenna electric, and this antenna stretches out outside the aluminum cylinder.
Wherein the thermometric end of thermopair is welded on an Al
2O
3Cover on the copper ceramic wafer, and weld the Al of a side
2O
3Cover copper ceramic wafer surface and adopt silicone rubber seal, and Al
2O
3The opposite side that covers the copper ceramic wafer is fixed on the other copper fastener of installing of isolation switch contact.
Wherein transformer storage capacitor circuit comprises bridge rectifier, the ac input end of this bridge rectifier is connected with the aluminum cylinder with the disconnector conductive arm respectively, its DC side then connects one and gets energy electric capacity, thereby allow the displacement electric current to getting the energy capacitor charging, this is got and can be connected with semiconductor discharge switch two ends with the pulse step-down transformer armature winding that is in series respectively at the electric capacity two ends, thereby discharge to the storage capacitor of connecting with this secondary winding by pulse step-down transformer secondary winding when the charging voltage on getting energy electric capacity reaches setting threshold, thereby this storage capacitor is electrically connected power supply with telemetry circuit.
Wherein telemetry circuit comprises single-chip microcomputer, and this single-chip microcomputer is electrically connected with thermopair with the ZigBee radio-frequency (RF) transceiver of antenna respectively.
Wherein around the inwall of two aluminum capsuls, all post siliconized plate.
The conventional method that at present electric system is monitored the high-voltage isolating switches in transformer substation contact temperature is to rely on manpower and infrared thermometer to carry out timing to patrol and examine, and this method not only expends a large amount of manpowers, can not realize the Real-Time Monitoring that contact temperature is changed.Therefore how although also there are at present some on-line measurement schemes to be suggested, because the on-line measurement device is installed on the disconnector high-pressure conductive arm, the power supply of solving device is bottleneck problem in these schemes.The utility model can make device rely on electric system high-pressure side self to come power taking by the mode of electric field induction power supply, need not additional power source, reliability is high and non-maintaining, has effectively overcome the technical bottleneck of levitation device power supply, for realizing that transformer station's unmanned is significant.
Description of drawings
Accompanying drawing 1 is use view of the present utility model;
Accompanying drawing 2 is schematic diagram of the present utility model;
Accompanying drawing 3 is for hanging the structural representation of measurement mechanism (1) in the utility model.
Embodiment
Fig. 1 has provided scheme of installation of the present utility model, and as shown in the figure, whole measurement mechanism is installed on the conductive arm 2 of disconnector, and the thermopair 4 of thermometric stretches out in installing, and passes through Al near conductive arm 2 contacts 5
2O
3Cover the copper potsherd and realized that with the copper fastener heat conduction contacts, guaranteed simultaneously the electrical isolation between telemetry circuit 7 and the conductive arm 2.Measurement data has realized wireless transmission by ZigBee-network.
Fig. 2 has provided the whole measurement mechanism principle schematic of (comprising wireless-transmission network).Whole measurement mechanism is divided into suspension measurement mechanism 1, ZigBee base station and three parts of backstage PC on the disconnector.Consist of a network by less radio-frequency between suspension measurement mechanism 1 and the ZigBee base station, the base station links to each other with backstage PC by communication optical fiber or cable.Hang measurement mechanism 1 and be mainly used in measuring isolation switch contact 5 temperature, and temperature measuring data is passed through wireless transmission; ZigBee base station Main Function is to set up ZigBee-network, and receives the temperature measuring data that each hangs measurement mechanism 1 transmission, and sends to backstage PC by optical fiber or cable; The Main Function of backstage PC is that the Current Temperatures to isolation switch contact 5 shows, and operation IEC61850 agreement, whole measurement mechanism is linked into the complex automatic system (DCS) of transformer station.
Because high voltage isolation switch contact (abbreviation contact) 5 temperature rises are the most important operational factors of disconnector, too high temperature can affect the safe operation of equipment, causes fault or accident, therefore must regularly monitor it.Now electric system is for the most methods that adopt manual inspection and Infrared survey of the detection of contact 5 temperature, and each transformer station that namely regularly sends someone adopts the non-contact measurement equipment such as infrared thermometer or thermal infrared imager that contact 5 temperature are detected.Because power system transformer substation is many, and also One's name is legion of the disconnector in each transformer station, so this work will expend a large amount of man power and materials, and particularly for the distant transformer station in distance city, this problem is relatively given prominence to.In addition, manual inspection can not in time be found the variation of isolation switch contact 5 temperature, in time pinpointing the problems and preventing that fault from being disadvantageous.Therefore, the utility model proposes a kind of technical scheme of measurement mechanism, this measurement mechanism is installed on the disconnector conductive arm 2, it directly carries out contact type measurement to contact 5 temperature by thermopair 4, then measurement result is sent on the backstage PC of transformer station's main control room by wireless network, and finally incorporates in the DCS system of transformer station.
As shown in Figure 2, whole disconnector temperature survey and data communication system comprise suspension measurement mechanism 1, ZigBee base station and three parts of backstage PC on the disconnector conductive arm 2.
Wherein hang on the conductive arm 2 that measurement mechanism 1 is installed in disconnector, be one and be suspended on high-tension side system, it is measured by near the temperature 4 pairs of contacts of thermopair 5, and measurement result sends to 50～100m ZigBee base station far away on the ground by built-in ZigBee radio-frequency (RF) transceiver.The key problem of floating measurement is the power supply that how to solve high-side devices, regularly changes owing to can't realize short-term, so all accumulator schemes are all infeasible, must adopt the self-powered mode, namely relies on device self to solve the problem of power supply.
The utility model proposes a kind of floating measurement scheme that adopts the electric field induction mode to power.As shown in Figure 2, at disconnector conductive arm 2 an induction pole plate (being aluminum cylinder 3) is installed, this induction pole plate can generation power frequency displacement current under action of high voltage with the stray capacitance C (electric capacity that dotted line is connected among Fig. 2) between the earth.Displacement current is decided by size and the high pressure grade of stray capacitance C.After induction pole plate size and installation site were determined, under specific high pressure grade, this displacement current was AC constant-current source.If can the energy that this constant current source carries be utilized, then for the powerup issue that solves floating measurement with significant because providing of this energy be stable and continue, be not subjected to the impact of environment, the problem that does not also have battery life, and the cost of power taking is very low.
Based on such thought, the utility model proposes the circuit that passes through high-voltage alternating electric field induction power taking shown in Figure 2.Four diode D1～D4 consist of a bridge rectifier, and its ac input end is connected respectively on disconnector conductive arm 2 and the induction pole plate, and its DC side then connects a low capacity and gets energy capacitor C 1.The Main Function of this circuit is to allow the displacement electric current can capacitor C 1 charge to getting.When the charging voltage on getting energy capacitor C 1 reaches certain setting threshold, it will discharge to the large capacity storage capacitor of another one C2 by a pulse step-down transformer T and semiconductor discharge switch S.The application fundamental purpose of pulse step-down transformer T is can the direct low-voltage of utilizing of measured circuit for the high-voltage variable of getting energy capacitor C 1 both sides is changed to.Diode D5 in the circuit is for the transformer leakage reactance provides the afterflow path, and diode D6 then is transformer secondary commutation diode.
This circuit adopts intermittent duty, i.e. energy storage, and---discharge the periodic duty mode that---again energy storage---discharges again, metering circuit is not powered during energy storage, and the ZigBee-network node also is in the off-grid disconnect mode; Put aside certain value when the energy of storage capacitor C2, metering circuit will be activated, and the ZigBee-network node also will start work, be connected into the wireless network that transformer station ZigBee base station creates, and temperature measurement result is sent to the base station.
The ZigBee wireless-transmission network is a wireless industrial LAN (Local Area Network) that was widely used in the last few years sensor field, and it has the advantages such as low-power consumption, low cost, safe and network capacity be large, is highly suitable under province's electrical environment and uses.The node of ZigBee-network comprises a master coordinator (Coordinator), three kinds on router (Routers) and terminal device (End Devices), and it can consist of star, tree-like and three kinds of latticed forms of net form.Coordinator is used for creating network; Router is used for the packet that mutually exchanges between the network node is transmitted according to specific path, and administers and maintains the path of route; End Device is created by the user, is used for carrying out the task of user's appointment, for example utilizes sensor to realize measuring, simultaneously as network node, it can select to add or withdraw from certain ZigBee-network, after adding network, can utilize ZigBee-network to transmit data to other network node.
In the utility model, ZigBee-network adopts the star net forming mode, and the ZigBee base station is the Coordinator node of network, and the contact 5 temperature online measurement mechanisms that are suspended on the disconnector conductive arm 2 then are the End Devices of ZigBee-network.Each End Device directly sends temperature measuring data to base station Coordinator, the base station will be converted to light signal with these data, deliver on the backstage PC that is positioned at the pulpit by optical fiber transmission.As shown in Figure 2, the single-chip microcomputer of a little power consumption is used to realize temperature survey and ZigBee-network End Device nodal function.Single-chip microcomputer has consisted of the node of ZigBee-network by the radio-frequency (RF) receiving and transmission module of a 2.4GHz, after the electric energy of the upper storage of storage capacitor C2 reaches q.s, this node startup work also is connected in the network of base station Coordinator foundation, and realizes that temperature data is to the transmission of Coordinator.
The Main Function of backstage PC is to receive and show metrical information from each isolation switch contact 5 temperature, and operation IEC61850 agreement, incorporate DCS system of transformer station as IED equipment, so that the temperature measuring data of each disconnector can be by electric system distant place control center real time inspection.
In the isolation switch contact 5 temperature suspension measuring system schemes that Fig. 2 provides, the on-line measurement device that hangs at conductive arm 2 is core of the present utility model, its embodiment is as shown in Figure 3: an aluminum cylinder 3 is used to realize the induction pole plate of electric field induction power supply, and this aluminum cylinder 3 is also as the shell of whole measurement mechanism.Aluminum cylinder 3 shapes not only can be responded to the electric field between the phase and ground, also can provide enough induction areas for alternate electric field; In addition, aluminum cylinder 3 shapes have larger surface curvature radius, can prevent effectively that other version is owing to problem is put in the concentrated office that causes of high-voltage electric field; At last, aluminum cylinder 3 also as the shell of whole metering circuit, shields the impact of external electric field.
Telemetry circuit 7 is installed in the aluminum capsul, and pulse step-down transformer T and storage capacitor C2 then are installed in the another one aluminum capsul.Adopt the 0.3mm folded silicon steel slice to form a magnetic field shielding (the about 1.5mm of thickness) around the inwall of each housing.The purpose of shielding is in order to prevent that disconnector maximum load current (up to thousands of ampere) from causing the saturated of transformer core and other magnetic spare, and then causes the problem of discharge circuit Damage by Short Circuit.
Connect with cable between the aluminum capsul of the aluminum capsul of dress telemetry circuit 7 and dress transformer storage capacitor circuit 10, simultaneously they are installed in respectively on two wooden base plates of making of electric insulation, adopt support column that the installation base plate of itself and the wooden work of electric insulation is interconnected and fixes between these two base plates.Install for two and fix with bolt after copper hoop 8 fastens mutually, thereby disconnector conductive arm 2 and whole measurement mechanism are closely linked together.The structural member of aluminium alloy is used for installation base plate and thin aluminum cylinder 3 shells and end cap etc. are combined.Antenna 6 stretches out outside the cylinder by the end cap at aluminum cylinder 3 two ends.
Temperature survey adopts thermopair 4 to realize, in order to form electric insulation and have the good capacity of heat transmission between thermopair 4 and disconnector conductive arm 2, has used power semiconductor modular encapsulation materials A l in the measurement mechanism
2O
3Cover copper ceramic wafer (DBC).The hot junction of thermopair 4 is used on the pad that scolder is welded to DBC, and then silicone rubber seal is adopted on whole surface, consists of a temperature element.Have screw hole on the DBC, whole temperature element is used and is bolted near the copper fastener of installing the isolation switch contact 5, thereby realizes the detection to conductive arm 2 contacts 5 temperature.
The ZigBee radio-frequency (RF) receiving and transmission module is the phase mutual edge distance that the suspension measurement mechanism 1 of 50～100m is connected to form communication link with the ZigBee base station.The ZigBee base station adopts directional antenna 6 and radio-frequency (RF) power amplification to create network, and covers all suspension measurement mechanism 1 terminal scopes.After base station processor is received the temperature measuring data that measurement mechanism sends, by optical fiber data are sent on the PC of backstage, communication modes is asynchronous communication mode (UART), baud rate is chosen as 9600.
Claims (6)
1. self-powered high voltage isolation switch contact temperature online measurement mechanism that adopts cylinder type electric field induction plate, it is characterized in that: comprise that at least one hangs measurement mechanism (1), ZigBee base station and backstage PC, wherein all hang measurement mechanism (1) all and pass through the ZigBee-network wireless connections between the ZigBee base station, and connect by optical fiber or cable between ZigBee base station and the backstage PC.
2. a kind of self-powered high voltage isolation switch contact temperature online measurement mechanism that adopts cylinder type electric field induction plate as claimed in claim 1, it is characterized in that: wherein hang measurement mechanism (1) and comprise the aluminum cylinder (3) that is sleeved on the disconnector conductive arm (2), this aluminum cylinder (3) is rigidly connected by insulating support (9) and the installation copper hoop (8) that is installed on the disconnector conductive arm (2), thereby between aluminum cylinder (3) and disconnector conductive arm (2), form cavity, insulating support in this cavity (9) is equipped with two aluminum capsuls, in these two aluminum capsuls, be separately installed with telemetry circuit (7) and transformer storage capacitor circuit (10), and connect by cable between these two circuit; Also comprise a thermopair (4), the thermometric end of this thermopair (4) contacts with isolation switch contact (5), and its signal output part is electrically connected by the interior telemetry circuit (7) of cable and aluminum cylinder (3); This telemetry circuit (7) also is electrically connected with an antenna (6), and this antenna (6) stretches out outside the aluminum cylinder (3).
3. a kind of self-powered high voltage isolation switch contact temperature online measurement mechanism that adopts cylinder type electric field induction plate as claimed in claim 2, it is characterized in that: wherein the thermometric end of thermopair (4) is welded on an Al
2O
3Cover on the copper ceramic wafer, and weld the Al of a side
2O
3Cover copper ceramic wafer surface and adopt silicone rubber seal, and Al
2O
3The opposite side that covers the copper ceramic wafer is fixed on the other copper fastener of installing of isolation switch contact (5).
4. such as the described a kind of self-powered high voltage isolation switch contact temperature online measurement mechanism that adopts cylinder type electric field induction plate of any one in the claims 1 to 3, it is characterized in that: wherein transformer storage capacitor circuit (10) comprises bridge rectifier, the ac input end of this bridge rectifier is connected 3 with disconnector conductive arm (2) with the aluminum cylinder respectively) be connected, its DC side then connects one and gets energy electric capacity (C1), thereby allow the displacement electric current can charge by electric capacity (C1) to getting, this is got and can be connected with semiconductor discharge switch two ends with pulse step-down transformer (T) armature winding that is in series respectively at electric capacity (C1) two ends, thereby get can electric capacity charging voltage on (C1) discharge to the storage capacitor (C2) of connecting with this secondary winding by pulse step-down transformer (T) secondary winding when reaching setting threshold, this storage capacitor (C2) with telemetry circuit (7) thus be electrically connected power supply.
5. a kind of self-powered high voltage isolation switch contact temperature online measurement mechanism that adopts cylinder type electric field induction plate as claimed in claim 4, it is characterized in that: wherein telemetry circuit (7) comprises single-chip microcomputer, and this single-chip microcomputer is electrically connected with thermopair (4) with the ZigBee radio-frequency (RF) transceiver of antenna (6) respectively.
6. a kind of self-powered high voltage isolation switch contact temperature online measurement mechanism that adopts cylinder type electric field induction plate as claimed in claim 2 is characterized in that: wherein all post siliconized plate around the inwall of two aluminum capsuls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220548742.4U CN202869683U (en) | 2012-10-25 | 2012-10-25 | Self-powered high-voltage insulating switch contact temperature on-line measuring device with cylindrical electric field sensor board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220548742.4U CN202869683U (en) | 2012-10-25 | 2012-10-25 | Self-powered high-voltage insulating switch contact temperature on-line measuring device with cylindrical electric field sensor board |
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| Publication Number | Publication Date |
|---|---|
| CN202869683U true CN202869683U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220548742.4U Expired - Fee Related CN202869683U (en) | 2012-10-25 | 2012-10-25 | Self-powered high-voltage insulating switch contact temperature on-line measuring device with cylindrical electric field sensor board |
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| CN (1) | CN202869683U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075816A (en) * | 2013-06-09 | 2014-10-01 | 成都瑞霆科技有限公司 | Electric field induction electricity taking type wireless temperature measuring system |
| CN104075816B (en) * | 2013-06-09 | 2016-11-30 | 成都瑞霆科技有限公司 | Electric field induction power taking type wireless temperature measurement system and frequency communication method thereof |
| CN107328488A (en) * | 2016-04-28 | 2017-11-07 | 珠海多监测科技有限公司 | Combined type trans system based on electric field induction |
-
2012
- 2012-10-25 CN CN201220548742.4U patent/CN202869683U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075816A (en) * | 2013-06-09 | 2014-10-01 | 成都瑞霆科技有限公司 | Electric field induction electricity taking type wireless temperature measuring system |
| CN104075816B (en) * | 2013-06-09 | 2016-11-30 | 成都瑞霆科技有限公司 | Electric field induction power taking type wireless temperature measurement system and frequency communication method thereof |
| CN107328488A (en) * | 2016-04-28 | 2017-11-07 | 珠海多监测科技有限公司 | Combined type trans system based on electric field induction |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20211025 |